• International conference on construction engineering and project management
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• 2009.05a
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• pp.747-753
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• 2009

Planning the construction for a system of bored piles in building foundation engineering is (1) to predict the time duration required to complete all the bored piles with due consideration of relevant engineering factors and site constraints; then (2) to predict the total project time generally by aggregating the predicted working duration for construction of each bored pile. The duration for construction of an individual bored pile results from analyzing various working sequences and different activity duration (such as predrilling, excavation, steelfixing, air-lifting, and concreting, etc.), which is informed by experiences and site records of previous projects. However, determining the project duration for constructing many bored piles on one site is much more complicated than adding up the time duration for individual piles. In practice, project schedules are often found to be unrealistic and incorrect during the construction stage. This is because construction planning is not based on a exhaustive and comprehensive evaluation of site factors, such as site layout plan, site constraints, quality control, environmental control, safety control and logical relationships between different trades. In this paper, we identify those factors based on a foundation engineering site in Hong Kong with ninety-seven bored piles and address their effects on uncertainties in activity time and project time.

• KIEAE Journal
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• v.8 no.6
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• pp.39-46
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• 2008

The purpose of this research is to analyze the planning characteristics based on the physical quality indicators and the users' satisfaction of parking space in apartment housing through the case study of 36 housing estate samples which were built in 1994-1998. The contents of this research consists of three main parts. The first part is to analyze the characteristics of residential environment based on the quality indicators of parking space in apartment housing. The second part is to analyze the correlation of quality indicators of parking space and development conditions in apartment housing. The third part is to analyze the correlation of users' satisfaction and physical quality indicators of parking space, and to propose the planning methods which increase the quality of residential environment of parking space in apartment housing.

• Journal of the Korean housing association
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• v.25 no.5
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• pp.113-124
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• 2014

The grands ensembles, or large-scale high-rise housing projects, are widely regarded as notorious products of postwar French government policy in the area of housing and urban planning. There was a general consensus that the grands ensembles had been a 'failure'. They were perceived as the source of all the ills of the contemporary city, as responsible for a social breakdown stemming from lack of infrastructure, geographical isolation, and monotonous environments. French government embarked on a broad renovation effort in light of the deteriorated condition of grands ensembles in the 1980s, which has been approved as generally 'successful'. This study focusing on French cases allowed me to demonstrate that following qualifications are critically important for successful housing projects: urban contextual continuity, socially mixed community, authentic planning for achieving sense of place, relationship between collective and individual expression, et cetera.

• Land and Housing Review
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• v.2 no.3
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• pp.205-215
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• 2011

Korea has experienced a remarkable economic achievement since the 1960s. However, behind this facade of growth and progress, a chronic housing shortage in the capital region, declining owner-occupation, rising housing costs, and polarization in housing conditions between the better-off and the worse-off clearly illustrate the impasse and crisis in housing that Korea now faces. In addition, the IMF crisis and the late global financial crisis shocked the Korean housing market. The Korean government has made significant policy changes to improve housing security for less-privileged groups. In order to achieve housing policy development, the Korean government has tried to employ of advanced countries. What are the benefits(merits) and dangers(demerits) of housing policy transfer between countries? This paper emphasizes that we must recognize about 'differences' rather than 'commonalities' between countries with respect to policy transfer. It also maintains that the government should play a main role as an enabler rather as a provider of 'low-cost' housing.

• Journal of Korean Society of Rural Planning
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• v.19 no.1
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• pp.137-147
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• 2013

The purpose of this study is to analyze the effect of "resident participatory education programs". This study methods was that applied this education programs to the residents of the fishing village after develop of education programs, and was surveyed to ninety five residents of these. As a result of the survey, "community attachment" and "sense of community" showed statistically significant differences from consciousness before and after education. Also, difference of residents consciousness according to the presence or absence of an education showed the same trend too. And, If in the presence or absence of the educational experience, residents consciousness was improved after the education programs. In other words, an education programs applied to in this study can be said to effective to that raise awareness of the residents. And this can be said to contribute in empowerment too.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2001.11a
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• pp.69-74
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• 2001

This study proposes interpretation on techniques as planning methods for environmentally friendly housing estates in a view of Kim young-ok′s Ki philosophy which is based on the east asian studies. through consideration on the environmentally friendly concept with case-studies. When residents make places for a community and participate in controlling housing estate, it is necessary to get harmonized and united among them. This is needed to better understand it in confucianism which regards practicing of humanity as the best of virtue of fellowing the way of heaven. Interests of the western in enviromental1y friendly housing estates are still limited to purpose of comfortableness, convenience, and capability. But, on the Ki philosophy, a ultimate purpose of environmentally friendly housing estates is not for the matters of western interests, but "health".

• Journal of Environmental Impact Assessment
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• v.20 no.5
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• pp.729-745
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• 2011

The purpose of this paper is to estimate the external diseconomies of an unwelcomed facility on the nearby houses. The facility and the area studied are Dangin-Ri power plant in Mapo-Gu, Seoul and the residential district surrounding it respectively. The nearby housing prices have been changed according to the time and circumstances of the public announcements about the reconstruction or removal plans of the plant. These price changes are regarded as the capitalized values of the external diseconomies due to the plant. This study is based on the hedonic price theory in order to estimate the diseconomies in monetary value. The tools for the estimation are four models of multiple regression with the transaction price as the dependant variable and various housing characteristics including the external effects of the plant as the independent variables. The sample analyzed is 833 house transactions for the past 5 years in the research area. The facts found are as follows; First, the most suitable functional form for the estimation is confirmed to be the linear model. Second, there are significant differences in influence on the housing values among the independent variables, that is, locational characteristics, physical features, and environmental changes with time. Third, the external diseconomy is estimated as \80,137,807 in case that the plant would be reconstructed in the underground of the present site, whereon a substitutional public park would be constructed and as \59,142,248 in case that the plant would move away.

• Journal of Environmental Impact Assessment
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• v.21 no.2
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• pp.297-314
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• 2012

This study investigates the stigma effect of unwelcomed facilities on apartment prices through multiple regressions based on hedonic price method. The areas studied are Sang-gye Jugong 7, 9, 10 apartment complexes. The facilities analyzed are the Chang-dong Electric Subway Depot and the Do-bong Driver's License Agency. The factors studied include the environmental variable (the elapsed time since the announcement of the re-location of these facilities), the view commanding, the distance from Chang-dong Depot, the distance from Do-bong Driver's License Test Course, the distance from neighboring facilities (subway stations, schools, parks and so on), the floor and each dwelling's exclusive space. The data used are 2,822 sales which have been collected since January 1, 2006. The facts found are as follows; first, the view commanding and the distance from the unwelcomed facilities are statistically significant. second, the environmental variable, 'days' turns out to have a positive (+) and a negative (-) significant relationship with the dependent variable, 'price', in period II and period IV respectively. This implies that the stigma effect is real. third, there are significant differences in the influence on the apartment prices among the independent variables according to time. fourth, the stigma effect is estimated as 33,686,920 Korean won in the case of the apartments which have the view commanding and 30,311,844 won in the other case before the global economic crisis. This effect seems to decrease to 22,085,078 won after the crisis. These facts suggest that stigma effects could be considered as one of the benefits in the cost-benefit analysis of Chang-dong Depot re-location project to produce somewhat higher NPV or B/C ratio.

• Design & Manufacturing
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• v.16 no.4
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• pp.52-59
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• 2022

Currently, Korea is an aging society and is expected to become a super-aged society in about four years. X-ray devices are widely used for early diagnosis in hospitals, and many X-ray technologies are being developed. The development of X-ray device technology is important, but it is also important to increase the reliability of the device through accurate data management. Sensor nodes such as temperature, voltage, and current of the diagnosis device may malfunction or transmit inaccurate data due to various causes such as failure or power outage. Therefore, in this study, the temperature, tube voltage, and tube current data related to each sensor and detection circuit of the diagnostic X-ray imaging device were measured and analyzed. Based on QC data, device failure prediction and diagnosis algorithms were designed and performed. The fault diagnosis algorithm can configure a simulator capable of setting user parameter values, displaying sensor output graphs, and displaying signs of sensor abnormalities, and can check the detection results when each sensor is operating normally and when the sensor is abnormal. It is judged that efficient device management and diagnosis is possible because it monitors abnormal data values (temperature, voltage, current) in real time and automatically diagnoses failures by feeding back the abnormal values detected at each stage. Although this algorithm cannot predict all failures related to temperature, voltage, and current of diagnostic X-ray imaging devices, it can detect temperature rise, bouncing values, device physical limits, input/output values, and radiation-related anomalies. exposure. If a value exceeding the maximum variation value of each data occurs, it is judged that it will be possible to check and respond in preparation for device failure. If a device's sensor fails, unexpected accidents may occur, increasing costs and risks, and regular maintenance cannot cope with all errors or failures. Therefore, since real-time maintenance through continuous data monitoring is possible, reliability improvement, maintenance cost reduction, and efficient management of equipment are expected to be possible.

• Journal of the Korean housing association
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• v.25 no.2
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• pp.45-54
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• 2014

In line with the previous study on the level of social cohesiveness of public rental housing communities in Seoul, this study investigated the community activities as a result of community cohesiveness and identified the cultural influences on the cohesiveness of the same case study areas. In general, there was relatively more active and voluntary participation of the residents in the community activities in the housing estates with higher social cohesiveness. The four communities were active in reporting community problems to the housing managers, greatly relying on the housing managers to solve the problems. In addition, mutual aid and community self-help were facilitated mainly through the activities of women's associations. However, small membership of community organisations and occasional disputes between the community organisations and estate managers, and among the community organisations themselves, seemed to have hampered the positive effects of the social cohesiveness in the case study areas. In terms of the cultural attributes, coexistence of collectivism and individualism, consideration of neighbourliness as an ideal social norm, incorporation of the neighbourhood environment into the housing estate environment and extensive use of outdoor public spaces were found.